title: Pilot-symbols-aided cycle slip mitigation for DP-16QAM optical communication systems.
abstract: A pilot-symbols-aided phase unwrapping (PAPU), which utilizes the time-division multiplexed pilot symbols that are transmitted with data, is proposed to do cycle slip detection and correction with the carrier phase estimation (CPE). Numerical simulations for 10 Gbaud dual-polarization 16-ary quadrature amplitude modulation (DP-16QAM) systems show that the block averaging quadrature phase-shift keying (QPSK) partitioning with PAPU greatly eliminates the performance degradation caused by cycle slips, maintains a low CS probability with less influence of filter length, and achieves a bit-error-rate (BER) performance below soft-decision forward error correction (FEC) limit 2 × 10⁻² at 15 dB optical signal-to-noise ratio with only 1.56% overhead and 6 MHz combined laser linewidth.
authors.forename: Haiquan
authors.initials: H
authors.lastname: Cheng
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Fangzheng
authors.initials: F
authors.lastname: Zhang
authors.forename: Jian
authors.initials: J
authors.lastname: Wu
authors.forename: Jianxin
authors.initials: J
authors.lastname: Lu
authors.forename: Guoyi
authors.initials: G
authors.lastname: Zhang
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
authors.forename: Jintong
authors.initials: J
authors.lastname: Lin